Knob attachment.



No. 692,550. Patented Feb. 4, I902. w. SGHARNWEBER.

KNOB ATTACHMENT. (Application med Apr. 2.4, 1901.)

(N0 Modl.)

mnw M f" H I INVENTOR v ATTORNEY w/fA/EssEs; I

a jogor shoulder 6.

UNITED STATES PATENTw OFFI E.

WILLIAM SOI-IARNWEBER, OF SEATTLE, WASHINGTON, ASSIGNOROF ONE- HALF TO ALFRED S. GROSS, OF SEATTLE, WASHINGTON.

KNOB ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 692,550, dated February 4, 1902.

Application filed April 24, 1901.

T0 at whom it mag c an/corn:

Be it known that I, WILLIAM SOHARNWEBER, a citizen of theUnited States, residing at Seattle, in the county of Kingand State of Wash? ington, have inventedcertain new and useful Improvementsin Knob Attachments,of which the followingisaspecification,reference being had therein to the accompanying drawings.

My invention relates to improvements in knob attachments; and it consists in doorknob attachments whereby the knob may be securely locked to the spindle to fit any thickness of door. These objects are attained in the construction hereinafter fully described, and illustrated in the accompanying drawings, in WhlCh."

' Figure 1 is anelevation of a door-lock with inyinvention, shown partly in section, applied thereto. Figs. 2, 3, and 4 are detailviews; and Fig. 5 is a similar View to Fig. 1, but with parts attached to a thicker door.

The spindle a is provided at one end with a fixed outbrdoor-knob, the shank being secured to the spindle in any suitable manner. A knob-shank has a thread 6 out from the end thereof to a collar or shelf b, upon the face of which I provide a projectingtooth n, and extending through the entire length of the shank is an opening, one endt being rectangular or of corresponding shape to the crosssection of the central portion of spindle a. At the other end the opening is enlarged to form a cavity or chamber h, terminating in To hold the shank in place, I use a sleeve-nut d, the female thread of which extends one-half its length, approximately, to register with the thread at of the spindle, and the remainder of its length is counterbored to permit that portion of the sleeve being slipped loosely over the poly onal section of the spindle.

The knob having an internal thread for screwing upon the aforesaid shank-thread b, is chambered to a depth so that when screwed tight down the bottom f of the chamber will I at any and all adjustments bear against the end of the sleeve d when the latter is screwed on the spindle and seated upon the shoulder e within the shank, which looks these parts, and the knob is itself locked to the shank by Serial no. 5 7,311. (No model.)

screwed on the shank until the end thereof will bear against the shoulder e or bottom of shank-cavity h, which in thin doors would be done by screwing on the sleeve with the counterbored end leading, as shown in Fig. 1,whereas with thick doors the sleeve would be re,-

-versed'-that is, the nut end would lead, as

in Fig. 5, and between these extreme adjust ments minor changes or adjustments may obviously be made by screwing the sleeve in or out, and the whole is securely locked by the knob being screwed upon the shank, the spring-catch s, in connection with tooth 'n, preventing the same from unscrewing. However, the knob may be removed by inserting a wire or the like through an aperture t', positioned in the flange b, so as to come beneath the catch 8 and adjacent to the tooth 72, when by pressure the catch is disengaged from the tooth to allow the knob to be freely turned to unscrew the same.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is v t 1. In a knob attachment, the combination with a spindle having a screw-threaded end, of ashank having an opening extending therethrough one end of which registers with the polygonal cross-section of the spindle and counterbored from the other end, a sleeve-nut of less outside diameter than the aforesaid counterbore of the shank having a female thread extending a portion of its length adapted to engage with the thread upon the said spindle and counterbored from the other end, a chambered knob adapted to lock the said sleevenut in place and be itself locked bya springcatch connected thereto engaging with a tooth upon a flange of the said shank, substantially as described.

. 2. In a knob attachment, the combination with a polygonal spindle having a threaded end, and a chambered knob having an intertoo nal thread cut therein and adapted to engage tion of its length and counteibared the re- 1: with the thread upon the shank, of said shank mainder,substantiallyas and for the purposes having an external thread at one end and an described.

opening extending through the entire length In testimony whereof I affix my signature of the shank. one end of which opening adaptin presence of two witnesses.

ed to register with the polygonal cross-section WILLIAM SCHARNWEBER.

of the spindle and counterhored from the \Vitnesses:

other end, and a sleeve-nut having an inter- I PIERRE BARNES,

nal thread extending from one end fora por- J. W. FUGLER. 

